Gun-muffler.



J. H. STINSON.

GUN MUFFLER.

APPLIUATION FILED JUNE 23, 1909.

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Patented May 24, 1910.

QN NN JAMES HENRY STINSON, F COOKE, MONTANA.

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Specification otLet't-ers Patent. l 'Patented Diny 24, 1910.

Application led June 23, 1909. Serial No. 503,830.

To all whom 'it may concern.

Be it known-that I, JAMES H. STINsoN, a citizen of the United States, and a resident of Cooke, in the county of Park and State of Montana, have invented a new and I mproved Gun-Mutller, of which the following is a full, clear, and exact description.

vThe invention is an improvement in gun mulllers or silencers and has in view means to arrest the forward movement of the escaping owder gases and give the same a b ack- War( curling motion at successive points, whereby they escape gradually and produce a but slightly audible sound. This I accomplish by providing a casin constructed to be detachably applied to the muzzle of the rifle and having therein a series of dished disks or heads, the several heads being-arranged in spaced relation, with their concave sides facing rearwardly, and a sectional barrel forming a continuation of the rifle barrel, with each section of the barrel c arried by one of the heads and projecting slightly beyond each side thereof. Reference is to be had to the accompanying drawings forming a part of this specification,-in which sim1lar characters of reference indicate corresponding parts lin all the views.

Figure 1 is a plan of my improved gun mulller as detachably applied to the muzzle of a rifle, the outer ortion of the muffler being shown in cent-rallongitudinal horizontal section; Fig. 2 is a longitudinal vertical central" section of the same; Fig. 3 is a rear end view of the muffler when detached from the rifle; Fig. 4 is a cross-section on the line 4 4 of Fig. 2, looking in the direction of the arrow; and Fig. 5 is an outer face view of one of the muffler disks or heads.

In the construction of my improved gun muffler, I make use of a tubular casing l0 of suitable length, the saine having screwthreaded caps 11 and .12 at its forward and rearward ends respectively, and a cross Wall or disk 13 arranged slightly forward of the ca 12. Both the cap 12 and Wall 13 have a ining openings arranged eccentric to the casing near the top thereof, Withthe opening 14 in the cap 12 having a radial slot 15 passing toward the circumference of the casing an terminating in a pressed-out portion 16 of the band or screw-threaded flange of the cap. One edge of the slot 15 is arranged in substantial alinement with one -much the same manner splines 21 projecting vedge 0f an opening 17 formed in the top of the vcaslng, the openlno` being somewhat wider than the slot: to form a shoulder 18 at the front of the cap '12. This construction adapts the mutller to be easily applied and removed from the muzzle of the rifle in muzzle of the rifle being passed into the alining openings of the 'cap 12 and head 13, with the sight of the rifle in register with the slot 15. When the sight is passed into the opening 17, the 'inu'tller is given a partial turn to engage the sight on the shoulder 18.

That portion of the tubular casing' between the wall 13 and the outer or forward cap 11 is provided with a series of dished disks 19 arranged in spaced relation, with the concave si es of the disks facing rearwardly or toward the muzzle of the firearm.

The several disks are prevented from shifting theirposition to or from each other by spacing rings 20, the spacing rings closely fittingthe bore of the casing and receiving the edges of thc disks between them. .Relative rotation between the disks and casing is prevented by providin longitudinal keys 0r rom the inner wall of the-casing at diametrically op osite points into the slots 22, of like' shape, ormed -in the edges of the disks, this construction necessitating the making of the spacing rings 20 in two sections, with the-sections arranged at opposite sides of the splines.

That portion of the casing between the wall 13 and the outer cap 11 1s further provided with a sectional barrel forming a continuation of the barrel of the rifle, each section 23 of the barrel being carriedby one of-the heads 19 and arranged to proJect a slight distance to each side'of the head, with the outer edge of the barrel section conforming to the convexity of the head, and

as a bayonet, the

the opposite and inner ed e of the barrel section arranged transverse y of the casing and terminatlng a substantial distance,- at the bottom froln the next. inner or rearward barrel section. l The bore of thc 'sectional barrel'is slightly larger than the bore of the ril-le, and an o eniug 24, of equal or larger size, is forme in alinement therewith in the cap 11.

Upon the discharge of a rifle equipped with the muffler, the lout-rushing owder gases are arrested at successive polnts by the dished heads 19, and their directionA changed from a forward `movement to a.

Backward curling motion, which lreduces the ters Patent:

1. The combinationin a n muiiler, of a casing having gas-tight si e walls2 andA a seriesof heads dished in the same direction throughout and arranged'within the casing in spaced relation and havin' a projectile passage leading therethroug i, with lthe dished edges of the heads extending to the inner wall of the casing, and with the concave sides of the heads facing rearwardly to arrest the forward movement of the powder gases and give the .same a backward curling motion at successive points.

2. The combination in a gun muiiier, of a casing, and a series of heads arranged within the casing in spaced l relation and having a projectile passage leading therethrough, the heads being dished in the same direction throughout, with the central p0r tions thereof extending farthest outwardly and the dished edges thereof extending to the inner wall of the casing, and with the concave sides of the heads facing rearwardly to arrest the forward movement of the powder gases aiidgive the same a backward curling motion at successive points.

3. The combination'in a gun mufer, of a casing having spaced Walls at its rear end provided with alining openings to receive the muzzle of the gun, with the outer wall having a slot extending from the opening thereof and leading into an opening Vformed in the Side f the casing to meme the sight of the n, with the openin vin the casing relativ y wider than the s ot to form a shoulder to engage behind the sight.

4. The combination in a gun mu1er, of a casing, a series of dished heads arranged within the casing in spaced relation, with the concave sides of the heads facin rearwardly to turn the powder gases bac and a' sectional barrel eccentrically arranged within the casin with each section spaced apart and carrie by on of saidA heads.

5. The combination i a gun muffler, of a casing, a series of dished heads arranged within the casing in spaced relation, with the concave sidesI of the heads facing ,rear.

wardly to arrest the powder gases at suc-` cessive points, and a'sectional barrel arranged within the casing, witheach section of the'barrel carried by and projecting to# the opposite' sides of one of the heads, and with the outer edges of the barrel sections substantially conforming to the convexity of the heads.

6.- The combination in a gun muier, of a casing', a series of heads arrangedA within the casing 1n spaced relation, and a sectional barrel arranged within the casing, with the several sections spaced apart and each section projecting to both sides of and carried by one of said heads. 'l

In testimony whereof I have signedI my name to this specification in the presence of two subscribin witnesses.

JAME HENRY STINSON. Witnesses:

FLORENCE MCCARTHY, JOHN F. CURL. 

